Device for attachment to structural iron in concrete.



D. W. BROOKS.

DEVICE FOR ATIACHMENT T0 STRUCTURAL IRON IN CONCRETE.

APPLICATION FILED JUNE 10. 1914.

1,260,748. Patented Mar. 26, 1918.

WITNESSES DAVID w. BnooKs, on NEW YORK,

N. Y., ASSIGNOR T0 CONCRETE .11 Ed AW 1 1M.

STEEL COMPANY, 015

new YORK, n. Y., A conrona'rron or DELAWARE.

Specification of Letters Patent.

Patented Mar.2fi,1918.

Application filed June 10. 1914. Serial No. 844,116

To all whom it may concern: 7

Be it known that I, DAVID W. BROOKS, a citizen of the United States, anda resident of the city of New York, county and State of New York, haveinvented an Improvement in Devices for Attachment to Structural Iron inConcrete, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

The present invention relates to reinforcing meansfor use in concreteconstruction, one object being to provide a device which may be attachedto members of the structural iron work in said concrete for purposes oflocal reinforcement. In the drawings accompanying this speclfication, Ihave illustrated several forms of reinforcing clip embodying myinvention.

Figure 1 shows a preferred form of clip attached to a girder whichisadapted to be embedded in concrete.

Fig. 2 is a view in vertical cross section showing a clip attached to ag1rder embedded in concrete.

Fig. 4 shows a preferred form of clip with its parts in normalunattached relation.

Figs. 3 and 5 illustrate modifications of the device and methods ofattachment.

In Figs. 1 and 2 of the drawings, I have illustrated one form of myinvention applied to a flanged steel girder 1. A concrete slab, as 2,for covering one side of sald girder, may be eifectively held in contacttherewith and with adjacent inclosing concrete masses by suitablereinforcing and connecting means lrere shown as wire clips havingattaching portions or 1ron engaging means 3 and 4 adapted to engagerespectlvely the opposite edges 5 and 6 of the flange 7 forming thebottom surface of the girder 1. In order that the reinforcing clips herereferred to may be easily and quickly applied to the girder and heldsecurely thereon, the attaching portions 3, 3 and 4, 4, Fig. 1, of saidclips are'connected by runs or reach mem bers 8 and 9 respectively sorelated to each other and to said attaching portions as to hold thelatter in secure engagement with said flange by spring pressure.

Inasmuch as the attaching portlons 3 and 4 are normally adjacent to eachother as shown in Fig. 4, and the runs 8 and 9 are disposed in similarrelation, when 1t 18 desired to attach a clip to a girder, or other partof the structural framework, the said portions may be drawn apartagainst the spring resistance of their respective runs a sufficientdistance to permit said portions to embrace the flange edges'5 and 6respectively, and upon being released against said edges to maintain theclip in positive engagement with the girder. It will be obvious that theextent of the reinforcing may be varied considerably according to thenumber of clips thus attached to a girder over any given distance; also,when are attached so that their ends overlap, they may form a mesh likestructure, the retaining capacity of which may vary in similarproportion. Each attaching portion may conveniently comprise springpressed means as 10, and 11, Fig. 4, to grip the flange after theengaging means have been sprung over the edge thereof. As illustrated inFig. 2, the runs 8 and 9 may be spaced from the face of the girder topass substantially through the interior of the concrete slab 2 which mayconveniently form a protective covering for said girder. In order thatthe masses of concrete inclosing the girder may be tried together tostrengthen and unify the entire concrete covering, I have provided meanson the reinforcing clip whereby a supported mass or slab as 12 may beconnected with and help suspend theslab 2 formed on the dependingvsurface of the girder l. Said means may comprise convolutions in saidwire having portions 13 adapted to be embedded in the interior of themass 12 and connecting portions 14 adapted to connect said portions 13to the runs 8 and 9 hereinabove described as reinforcing the slab 2.Thus the latter may not only be secured in position on the 'rder bybeing suspended from the flange but also by being tied to the masses 12which are firmly supported on said flange. Obviously, a similar. bindingeffect may be expected where the slab is not wholly pendent but isotherwise partially supported as in a slab covering a verticallydisposed structural iron member.

In Figs. 1, 2, and 4, I have illustrated a preferred form of myinvention; but it is contemplated that it may be embodied in a varietyof forms some of which are illustrated in Figs. 3 and 5. Where separatepieces of wire are fastened together to form.

the clips a complete clip, any suitable connection may be madebetweenthem. In the present case, Fig. 1, the wires are twisted togetherintermediate their'free ends which, upon being drawn apart. tend tospring back to their normal adjacent position, thus being adapted forpositive attachment to a girder or the like. Where the wire parts arenot thus joined, they may be made to grip the girder by crossing themintermediate their ends, Fig. 5, thus providing a fulcrum from which todeflect each end preparatory to attaching to a girder or the like.

It will be readily understood that among the advantages involved in theuse of a device embodyin my invention are the ease and rapidity withwhichit may be attached and the wide variety of uses to which it may beapplied. As pointed out heretofore, thel degree of reinforcing efi'ectmay be varied indefinitely by varying the number of clips or the sizeof'the wires, or both. The'positive gripping action of the said clipsupon the flange or other suitable part of the framework insures apositive and secure connection therewith. At the same time, they may beremoved .or have their relative positions altered without greatdifliculty at any time before they are inclosed in concrete.

I elaim'as my invention r A clip for use with structural iron inconcrete, comprising runs interengaging between their ends to formresilient arms, the arms at each side of the engaging portions beingnormally juxtaposed and adapted to be spread apart in applying the clipto an iron. y

In testimony where, I have signed my name to this s ecification, in thepresence of two subscribing witnesses, this 9th day of 40 June, 1914.

DAVID W. BROOKS.

Witnesses:

MANVEL Wrrrrrnmonn, Jomr W. THOMPSON.

